Bump m2r from 0.2.1 to 0.3.1 (#301)

Bumps [m2r](https://github.com/miyakogi/m2r) from 0.2.1 to 0.3.1.
- [Changelog](https://github.com/miyakogi/m2r/blob/dev/CHANGES.md)
- [Commits](miyakogi/m2r@v0.2.1...v0.3.1)

---
updated-dependencies:
- dependency-name: m2r
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -36,7 +36,7 @@ Jinja2==3.0.1
 jmespath==1.0.1
 keyring==23.5.0
 lazy-object-proxy==1.9.0
-m2r==0.2.1
+m2r==0.3.1
 MarkupSafe==2.1.3
 mccabe==0.6.1
 mistune==0.8.4